On Mon, Apr 19, 2021 at 02:28:19PM +0100, Mark Woolfson wrote: > I am trying to build some drivers under CentOS 8.3 using scripts which work > on CentOS 8.2. > > However, I am now missing the include file drm/drmP.h. > > Please can you tell me where I can find this file. I believe drm/drmP.h was removed from the kernel in the v5.5-ish era, so I suspect that part of the kernel must have been backported to the CentOS 8.3 kernels. You'll need to update your code to use the new drm subsystem. I believe the nvidia drivers had to do this too. -- Jonathan Billings <billings at negate.org>